I Designed It, I Built It

The place to show objects you designed in CAD and then built in your shop, garage, yard etc. Let us know how well the design translated into the real object and what troubleshooting you might have done to fix design problems. How did your design change as you put it through real-life testing? Do you use the object or tool etc. to keep your shop running? What did you learn about "Real Life" design and engineering by doing this project?
Any kind of project is welcome such as furniture, buildings, tools, home items, jewelry etc just as long as you made it yourself.